Intel Xeon E5 2658 v3 's Advantages
Released 3 years and 7 months late
Higher specification of memory (2133 vs 3)
Newer PCIe version (3 vs 2)
Higher base frequency (2.2GHz vs 1.6GHz)
Larger L3 cache size (30MB vs 4MB)
More modern manufacturing process (22nm vs 32nm)
Intel Xeon E5603 's Advantages
Lower TDP (80W vs 105W)